@article {937, title = {Association of physical activity with sleep-disordered breathing.}, journal = {Sleep Breath}, volume = {11}, year = {2007}, month = {2007 Sep}, pages = {149-57}, abstract = {

This study was performed to determine whether there is a protective association between participation in vigorous or vigorous/moderately vigorous physical activity and the prevalence of sleep-disordered breathing (SDB). Polysomnographic and questionnaire data from the baseline examination of 4,275 participants in the Sleep Heart Health Study (SHHS) were analyzed in relation to information on amount of physical activity and other potentially relevant factors collected from five SHHS parent cohorts (Atherosclerosis Risk in Communities Study, Cardiovascular Health Study, Framingham Heart Study, Strong Heart Study, and Tucson Epidemiologic Study of Airways Obstructive Diseases). Logistic regression models were fitted to determine if amount and strenuousness of physical activity was associated with the presence of SDB. At least 3 h per week of vigorous physical activity reduced the odds of SDB, defined as a respiratory disturbance index (RDI) of at least 15 apneas/hypopneas per hour (Adjusted OR, 0.68; 95\%CI, 0.51-0.91). A qualitatively similar but slightly weaker association was observed when SDB was defined as a RDI > or = 10 per hour (Adjusted OR, 0.81; 95\%CI, 0.64-1.02). These findings remained after adjustment for sleepiness and restricting analyses to participants with good health. Three or more hours of moderately vigorous or vigorous physical activity also appeared to confer some protection against SDB, but these associations were weaker. Gender- and obesity-stratified analyses suggested that the protective association between physical activity and SDB occurred primarily in men and those who were obese. A program of regular vigorous physical activity of at least 3 h per week may be a useful adjunctive treatment modality for SDB, but this association needs confirmation with a prospective clinical trial.

}, keywords = {Adult, Cardiac Rehabilitation, Cardiovascular Diseases, Cohort Studies, Exercise, Female, Humans, Longitudinal Studies, Male, Middle Aged, Obesity, Polysomnography, Pulmonary Disease, Chronic Obstructive, Pulmonary Ventilation, Risk Factors, Sex Factors, Sleep Apnea Syndromes, Sleep Apnea, Obstructive, Sleep Stages, Weight Loss}, issn = {1520-9512}, doi = {10.1007/s11325-006-0095-5}, author = {Quan, Stuart F and O{\textquoteright}Connor, George T and Quan, Jason S and Redline, Susan and Resnick, Helaine E and Shahar, Eyal and Siscovick, David and Sherrill, Duane L} } @article {996, title = {Relationship between reported and measured sleep times: the sleep heart health study (SHHS).}, journal = {J Clin Sleep Med}, volume = {3}, year = {2007}, month = {2007 Oct 15}, pages = {622-30}, abstract = {

STUDY OBJECTIVE: Subjective and objective assessments of sleep may be discrepant due to sleep misperception and measurement effects, the latter of which may change the quality and quantity of a person{\textquoteright}s usual sleep. This study compared sleep times from polysomnography (PSG) with self-reports of habitual sleep and sleep estimated on the morning after a PSG in adults.

DESIGN: Total sleep time and sleep onset latency obtained from unattended home PSGs were compared to sleep times obtained from a questionnaire completed before the PSG and a Morning Survey completed the morning after the PSG.

PARTICIPANTS: A total of 2,113 subjects who were > or = 40 years of age were included in this analysis.

MEASURES AND RESULTS: Subjects were 53\% female, 75\% Caucasian, and 38\% obese. The mean habitual sleep time (HABTST), morning estimated sleep time (AMTST), and PSG total sleep times (PSGTST) were 422 min, 379 min, and 363 min, respectively. The mean habitual sleep onset latency, morning estimated sleep onset latency, and PSG sleep onset latency were 17.0 min, 21.8 min, and 16.9 min, respectively. Models adjusting for related demographic factors showed that HABTST and AMTST differ significantly from PSGTST by 61 and 18 minutes, respectively. Obese and higher educated people reported less sleep time than their counterparts. Similarly, small but significant differences were seen for sleep latency.

CONCLUSIONS: In a community population, self-reported total sleep times and sleep latencies are overestimated even on the morning following overnight PSG.

}, keywords = {Adult, Attitude to Health, Female, Health Status, Humans, Male, Middle Aged, Polysomnography, Psychometrics, Sleep Initiation and Maintenance Disorders, Sleep Stages, Surveys and Questionnaires, Time Factors, Wakefulness}, issn = {1550-9389}, author = {Silva, Graciela E and Goodwin, James L and Sherrill, Duane L and Arnold, Jean L and Bootzin, Richard R and Smith, Terry and Walsleben, Joyce A and Baldwin, Carol M and Quan, Stuart F} }